Related Experiment Video
Updated: Jun 19, 2026
09:41
Functional Assessment of Kinesin-7 CENP-E in Spermatocytes Using In Vivo Inhibition, Immunofluorescence and Flow Cytometry
Published on: December 28, 2021
MEIG1 is essential for spermiogenesis in mice.
Zhibing Zhang1, Xuening Shen, David R Gude
1Departments of Obstetrics and Gynecology and Biochemistry, Virginia Commonwealth University, Richmond, VA 23298, USA. zzhang4@vcu.edu
Summary
Meiosis expressed gene 1 (MEIG1) protein is crucial for male fertility. MEIG1 deficiency disrupts sperm formation by affecting the manchette structure, leading to sterility in mice.
Area of Science:
- Reproductive biology
- Molecular and cell biology
- Genetics
Background:
- Spermatogenesis involves complex morphological changes, with key regulatory genes largely unknown.
- The SPAG16S isoform interacts with MEIG1, a protein previously linked to meiosis.
Purpose of the Study:
- To investigate the function of MEIG1 in spermatogenesis.
- To elucidate the molecular mechanisms underlying MEIG1's role in sperm formation.
Main Methods:
- Gene knockout of Meig1 in mice.
- Transmission electron microscopy to analyze spermatid morphology.
- Protein-protein interaction analysis (MEIG1 and PACRG).
Main Results:
- Meig1 mutant mice exhibited sterility due to defects in sperm elongation and condensation.
- Transmission electron microscopy revealed disrupted manchette structure in MEIG1-deficient spermatids.
- MEIG1 interacts with PACRG, and its deficiency reduces testicular PACRG levels.
Conclusions:
- MEIG1 is essential for manchette formation and function during spermiogenesis.
- The MEIG1/PACRG complex plays a critical role in sperm head and flagellar development.
- MEIG1 is vital for male fertility, independent of its proposed role in meiosis.
